I have optimize the site for few keywords. It was success till yesterday and show my site in 1st page. But now when i search with that keyword my site is not appearing and at the bottom of the search show me "In response to a legal request submitted to Google, we have removed 1 result(s) from this page. If you wish, you may read more about the request at ChillingEffects.org." But there are other site with same contents and all other sites are shown for that keyword. My site contents are 100% unique and adult contents. So why only my site was removed. If that is the thing why other sites are showing for that keyword?
Please explain some one.

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